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Ozone loss in the Arctic stratosphere over Kiruna, Sweden, during winter/spring 2005/06
Uwe Raffalski(1), Gerd Hochschild(2)
, Gerhard Kopp(2)
, Jo Urban(3)
, and Peter Voelger(1)
(1)
Swedish Institute of Space Physics,
Box 812,
98128 Kiruna,
Sweden
(2) Forschungszentrum und Universität Karlsruhe, Postfach 3640, 76021 Karlsruhe, Germany
(3) Chalmers University of Technology, Hörsalsvägen 11, 412 96 Göteborg, Sweden
Abstract
Abstract: We will present the Arctic ozone loss of the recent winter as
derived from measurements of KIMRA. The millimeter wave radiometer KIMRA
is operated continuously at IRF Kiruna (67.8 N and 20.4 E). From the
measurements we calculated ozone profiles between 15 and 60 km. We
derived column densities for this altitude region including most of the
atmospheric ozone. In order to estimate the Arctic winter ozone loss we
took into account only those measurements that have been taken while
Kiruna was located well inside the polar vortex as defined by the
'Equivalent Latitude' method. Although this method has problems during
the phase of formation and break up of the vortex it has a more flexible
definition of the vortex edge. This leads to a significantly higher
number of data points for the ozone loss analysis. Ozone loss can be
hidden in dynamic effects such as subsidence of air masses inside the
vortex. In order to correct for this effect we use N2O data from the
Odin satellite. Given a stable polar vortex and more occasions of
extensive PSC coverage as already has been observed in early January by
the IRF lidar system we expect a substantial ozone loss for the winter
2005/06.
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